If you need a number for a guy that does a great job at rebuilding tranny's for a good price, PM me.
And 170 isnt anything to worry about.....I have touched 180-200 a few times in my truck with no issues.....you get to that point though and you are gonna want to flush your trans soon after and put in new fluid.http://www.digi-panel.com/trannyoil.htm